Make autoIndex syncIndex instead of createIndex

[GustavoOS]

Prerequisites

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🚀 Feature Proposal

autoIndex will check existing indexes instead of re-creating indexes everytime the app runs

Motivation

Mongoose docs explains that autoIndex is not advised to production environments because it creates indexes everytime the app runs. This makes the process of introducing indexes tricky in production. Mongoose offers synIndexes, but this has to be called individually for each model.

Example

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